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Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/9464
Light scattering from suspensions under external gradients
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We analyze the light-scattering spectrum of a suspension in a viscoelastic fluid under density and velocity gradients. When a density gradient is present, the dynamic structure factor exhibits universality in the sense that its expression depends only on the reduced frequency and the reduced density gradient. For a velocity gradient, however, the universality breaks down. In this last case we have found a transition point from one to three characteristic frequencies in the spectrum, which is governed by the value of the external gradient. The presence of the viscoelastic time scales introduces a shift in the ``critical¿¿ point.
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BONET I AVALOS, Josep, et al. Light scattering from suspensions under external gradients. Physical Review A. 1990. Vol. 41, num. 4, pags. 1923-1931. ISSN 1050-2947. [consulted: 17 of June of 2026]. Available at: https://hdl.handle.net/2445/9464